CN113365361B - Method, system, medium and device for measuring and calculating 5G terminal service performance and PRB (physical resource block) resource - Google Patents
Method, system, medium and device for measuring and calculating 5G terminal service performance and PRB (physical resource block) resource Download PDFInfo
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- CN113365361B CN113365361B CN202110809477.4A CN202110809477A CN113365361B CN 113365361 B CN113365361 B CN 113365361B CN 202110809477 A CN202110809477 A CN 202110809477A CN 113365361 B CN113365361 B CN 113365361B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
Abstract
The invention relates to a method, a system, a medium and equipment for measuring and calculating 5G terminal service performance and PRB resources, which comprises the following steps: calculating MCS; simulating to obtain a waterfall curve; determining an MCS curve meeting the service bandwidth requirement according to the MCS Index and the waterfall curve, and fixing the SINR value of the MCS curve to uniquely determine the BLER value of the curve; acquiring transmission times according to the BLER value; and calculating the transmission delay according to the influence factors of the transmission times and the transmission delay. On the basis of determining the service bandwidth and the reliability of the terminal, the invention simulates the relationship between the service delay size and the number of PRB resources, and finally determines the number of the PRB resources required by the wireless air interface slice according to the service delay requirement.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a method, a system, a medium and equipment for measuring and calculating 5G terminal service performance (time delay, reliability and bandwidth) requirements and PRB resource requirements.
Background
At present, few researches are conducted on a method for measuring and calculating service performance (time delay, reliability and bandwidth) requirements and 5G network PRB resource requirements, and the current researches cannot combine the service performance requirements with the PRB resource requirements.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a method, a system, a medium, and a device for measuring and calculating 5G terminal service performance requirements and PRB resource requirements, which can measure and calculate the number of PRB resources required by a wireless air interface side network slice according to the terminal service performance (delay, reliability, and bandwidth) requirements under the 5G network technical standard, so as to meet the target of applying a 5G network to a terminal service system.
In order to achieve the purpose, the invention adopts the following technical scheme: a method for measuring and calculating 5G terminal service performance requirement and PRB resource requirement comprises the following steps: calculating MCS; simulating to obtain a waterfall curve; determining an MCS curve meeting the service bandwidth requirement according to the MCS Index and the waterfall curve, and fixing the SINR value of the MCS curve to uniquely determine the BLER value of the curve; acquiring transmission times according to the BLER value; and calculating the transmission delay according to the influence factors of the transmission times and the transmission delay.
Further, the MCS calculation method includes:
calculating the size TBS of a transmission block according to the service rate W;
obtaining N from TBS post-backwardinf o；Ninf oDefining intermediate variables for the 5G standard;
according to Ninf oThe MCS Index is calculated.
Further, the MCS Index calculation formula is as follows:
Ninfo＝NRE*R*Qm*v
NRE＝PRB*12*ofdm-k
wherein R and QmRespectively corresponding target code rate and modulation order of MCS Index, v is the number of layers, NREFor the number of subcarriers for transmitting data, PRB is the number of usable resource blocks, of dm is the number of symbols allocated for data transmission, and k is the number of REs for overhead.
Further, the transmission number calculation formula is as follows:
1-BLERN_trans＞＝reliability
in the formula, BLER is the obtained BLER value, N _ trans is the number of transmissions, and reliability is the service reliability index.
Further, the influencing factors of the transmission delay include the following air interface parameters: TDD frame structure/carrier mode, timing parameters K, FDD/TDD transmit mode, and scheduling mode.
Further, the method for calculating the transmission delay includes:
inputting a frame structure array A [ i ] and a time sequence parameter K according to the transmission times;
sequentially judging whether the mode is an FDD mode or a TDD mode, an uplink mode or a downlink mode, and a scheduling mode;
and calculating time delay according to the mode judgment result.
Further, the time delay calculation method corresponding to each judgment result is as follows:
for a TDD uplink SR scheduling mode, the time delay calculation comprises the calculation of SR _ slot number, K2_ slot number and RE _ TX _ slot number, and the time delay is SR _ slot + K2_ slot + RE _ TX _ slot;
for the TDD uplink scheduling-free mode, the SR _ slot number is 0, the rest is the same as the TDD uplink SR scheduling mode, and the time delay is K2_ slot + RE _ TX _ slot;
for the TDD downlink mode, the time delay calculation comprises calculation of K0_ slot number, K1_ slot number and K3_ slot number, and the time delay is K0_ slot + K1_ slot + K3_ slot;
for the FDD downlink mode, N is the number of retransmissions, and N is N _ trans-1, where the time delay is K0+ K1+ K3 × N + 1;
for the FDD uplink SR scheduling mode, the time delay is SR + K2+ RE _ TX _ N +1, and N is N _ trans-1;
for FDD uplink scheduling-free mode, the time delay is K2+ RE _ TX N +1, and N is N _ trans-1.
A system for measuring and calculating 5G terminal service performance requirement and PRB resource requirement comprises: the device comprises a first calculation module, a second calculation module, a BLER value acquisition module, a transmission frequency determination module and a time delay calculation module; the first calculating module is used for calculating MCS; the second calculation module is used for simulating and acquiring a waterfall curve; the BLER value acquisition module determines an MCS curve which meets the requirement of service bandwidth according to the MCS Index and the waterfall curve, and the BLER value of the curve can be uniquely determined by fixing the SINR value of the MCS curve; the transmission frequency determining module is used for acquiring the transmission frequency according to the BLER value; and the time delay calculating module calculates the transmission time delay according to the transmission times and the influence factors of the transmission time delay.
A computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by a computing device, cause the computing device to perform any of the above methods.
A computing device, comprising: one or more processors, memory, and one or more programs stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions for performing any of the above-described methods.
Due to the adoption of the technical scheme, the invention has the following advantages:
the invention provides a complete method for measuring and calculating the requirements of terminal service performance (time delay, reliability and bandwidth) and the PRB resource requirements of a 5G network, which can measure and calculate the quantity of the PRB resources required by the wireless interface air slice of the 5G network according to the requirements of the service performance and effectively solve the problems in the prior art.
Drawings
Fig. 1 is a flow chart of air interface delay measurement and calculation according to an embodiment of the present invention;
fig. 2 is a structure diagram of 5G air interface delay estimation according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating SR scheduling/scheduling-free TDD uplink and downlink timing according to an embodiment of the present invention;
fig. 4 is a timing diagram of SR scheduling/scheduling-free FDD uplink and downlink according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
The invention provides a method for measuring and calculating 5G terminal service performance (time delay, reliability and bandwidth) requirements and 5G network PRB resource requirements, which comprises the following steps: MCS calculation, waterfall curve simulation, BLER acquisition, transmission frequency calculation and transmission delay calculation. On the basis of determining the service bandwidth and the reliability of the terminal, the invention simulates the relationship between the service delay size and the number of PRB resources, and finally determines the number of the PRB resources required by the wireless air interface slice according to the service delay requirement.
In a first embodiment of the present invention, as shown in fig. 1, a method for measuring and calculating 5G terminal service performance requirement and PRB resource requirement is provided, which includes the following steps:
step 1, calculating MCS;
the method specifically comprises the following steps:
step 1.1, calculating TBS according to the service rate W;
wherein, the service rate W is:
W＝MIMO*2u*TBS*1000
where MIMO is the number of antenna streams, u is the carrier mode (15kHz, u is 0; 30kHz, u is 1), and TBS is the transport block size;
step 1.2, obtaining N by backward pushing according to TBSinf o(ii) a Wherein N isinf oIntermediate variables are defined for the 5G standard and the calculation method is taken from the 5G standard TS 38.214.
Step 1.3 according to Ninf oCalculating the MCS Index;
the calculation formula is as follows:
Ninfo＝NRE*R*Qm*v
NRE＝PRB*12*ofdm-k
wherein, R and QmRespectively corresponding target code rate and modulation order of MCS Index, v is the number of layers，NREFor the number of subcarriers for transmitting data, PRB is the number of usable resource blocks, of dm is the number of symbols allocated for data transmission, and k is the number of REs for overhead.
the waterfall curve refers to a relation curve of SNR and BLER of channels corresponding to various MCS under a certain specific communication scene and system parameter configuration; the curve is generally obtained by a large amount of Monte-Carlo link-level simulation, and a waterfall curve of 5G MCS Index is obtained by simulation.
Step 3, determining an MCS curve meeting the service bandwidth requirement according to the MCS Index and the waterfall curve, and fixing the SINR value of the MCS curve to uniquely determine the BLER value of the curve;
different propagation models can affect the size of the BLER value under the condition of a fixed SINR value, thereby affecting the calculation of the transmission times.
Step 4, acquiring transmission times according to the BLER value;
the transmission times calculation formula is as follows:
1-BLERN_trans＞＝reliability
in the formula, BLER is the BLER value obtained in step 3, N _ trans is the transmission frequency, and reliability is the service reliability index.
Step 5, calculating the transmission time delay according to the influence factors of the transmission times and the transmission time delay;
the influencing factors of the transmission delay include the following air interface parameters:
(1) TDD frame structure/carrier mode: different TDD frame structures affect the ratio of uplink and downlink time slots, and different carrier modes affect the frame length.
(2) A timing parameter K: the configuration of different timing parameters K affects the retransmission slot interval.
(3) FDD/TDD transmission mode: different transmission modes affect the calculation of the time delay time slot number, and retransmission in the FDD mode does not need waiting, so the average time delay time slot number is less than that in the TDD mode.
(4) And (3) scheduling mode: different scheduling modes influence the calculation of the time delay time slot number, and the average time delay time slot number of the scheduling-free mode is smaller than that of the SR scheduling mode.
Therefore, as shown in fig. 2, the step of calculating the transmission delay according to the influence factor of the transmission delay and the transmission times is as follows:
step 5.1, inputting a frame structure array ai and a time sequence parameter K according to the transmission times; wherein A [ i ] represents the size of the ith array;
step 5.2, sequentially judging whether the mode is an FDD mode or a TDD mode, an uplink mode or a downlink mode and a scheduling mode;
step 5.3, calculating time delay according to the mode judgment result;
(1) as shown in fig. 3, for the TDD uplink SR scheduling mode, the time delay calculation includes calculation of SR _ slot number, K2_ slot number, and RE _ TX _ slot number;
the specific time delay calculation formula is as follows:
the time delay is SR _ slot + K2_ slot + RE _ TX _ slot;
(2) as shown in fig. 3, for the TDD uplink scheduling-free mode, the SR _ slot number is 0, and the rest are the same as the TDD uplink SR scheduling mode, and the specific formula of the time delay calculation is as follows:
the time delay is K2_ slot + RE TX _ slot;
(3) as shown in fig. 3, for the TDD downlink mode, the delay calculation includes calculation of K0_ slot number, K1_ slot number, and K3_ slot number, and a specific delay calculation formula is as follows:
k0_ slot + K1_ slot + K3_ slot;
(4) as shown in fig. 4, for the FDD downlink mode, n is the number of retransmissions, and the specific formula of the delay calculation is as follows:
time delay is K0+ K1+ K3N +1, N is N _ trans-1;
(5) as shown in fig. 4, for the FDD uplink SR scheduling mode, n is the number of retransmissions, and the specific formula of the delay calculation is as follows:
time delay SR + K2+ RE _ TX N +1, N _ trans-1;
(6) as shown in fig. 4, for the FDD uplink scheduling-free mode, n is the number of retransmissions, and the specific formula of the delay calculation is as follows:
the time delay is K2+ RE _ TX N +1, and N is N _ trans-1.
In a second embodiment of the present invention, a system for measuring and calculating 5G terminal service performance requirement and PRB resource requirement is provided, which includes: the device comprises a first calculation module, a second calculation module, a BLER value acquisition module, a transmission frequency determination module and a time delay calculation module;
the first calculation module is used for calculating MCS;
the second calculation module is used for acquiring a waterfall curve in a simulation manner;
the BLER value acquisition module is used for determining an MCS curve which meets the requirement of service bandwidth according to the MCS Index and the waterfall curve, and fixing the SINR value of the MCS curve can uniquely determine the BLER value of the curve;
the transmission frequency determining module is used for acquiring the transmission frequency according to the BLER value;
and the time delay calculation module is used for calculating the transmission time delay according to the transmission times and the influence factors of the transmission time delay.
In a third embodiment of the invention, there is provided a computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by a computing device, cause the computing device to perform any of the methods as in the first embodiment.
In a fourth embodiment of the present invention, there is provided a computing device comprising: one or more processors, memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions for performing any of the methods as in the first embodiment.
Example (b):
in this embodiment, according to the performance index of the existing power system differential protection service, under the condition that the service bandwidth requires 2Mbit/s and the reliability requires 99.99%, the relationship between the air interface delay and the PRB resources is calculated.
Specifically, the conversion of the service air interface delay and the number of the PRB resources includes the following steps:
and step 1, calculating MCS.
When the carrier interval is 30kHz and the number of transmitting and receiving antennas is 2, substituting the bandwidth 2Mbit/s into a formula
W＝MIMO*2u*TBS*1000
TBS 500 was calculated as the requirement N according to TS 38.214 Table 5.1.3.2-2info＝504。
When PRB is 6, v is 1, ofdm is 14, and k is 0, R QmSpectrum efficiency 0.6016, MCS Index 10, can be selected from TS 38.214 table 5.1.3.1-3.
And 2, simulating a waterfall curve.
The simulated MCS Index is 10, the modulation scheme is 16QAM, and the target code rate is 308/1024.
And step 3, obtaining BLER and calculating transmission times.
Assuming that SINR value is x, determining BLER to be 0.9, substituting into formula
1-0.9N_trans＞＝0.9999
The number of transmissions is 4.
And 4, calculating time delay.
And determining a TDD transmission mode, wherein the frame structure is DDDSUDDSUU, the scheduling mode is scheduling-free, and the calculation time delay is 19.2 ms.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Claims (10)
1. A method for measuring and calculating 5G terminal service performance requirement and PRB resource requirement is characterized by comprising the following steps:
calculating MCS;
simulating to obtain a waterfall curve;
determining an MCS curve meeting the requirement of service bandwidth according to the MCS Index and the waterfall curve, and fixing the SINR value of the MCS curve to uniquely determine the BLER value of the curve;
acquiring transmission times according to the BLER value;
and calculating the transmission delay according to the influence factors of the transmission times and the transmission delay.
2. The method of claim 1, wherein the MCS calculation method comprises:
calculating the size TBS of a transmission block according to the service rate W;
obtaining N from TBS post-backwardinf o；Ninf oDefine intermediates for 5G StandardA variable;
according to Ninf oThe MCS Index is calculated.
3. The method of claim 2, wherein the MCS Index is calculated as follows:
Ninfo＝NRE*R*Qm*v
NRE＝PRB*12*ofdm-k
wherein R and QmRespectively the target code rate and the modulation order corresponding to the MCS Index, v is the number of layers, NREFor the number of subcarriers for transmitting data, PRB is the number of usable resource blocks, of dm is the number of symbols allocated for data transmission, and k is the number of REs for overhead.
4. The measurement method according to claim 1, wherein the transmission times are calculated by the formula:
1-BLERN_trans＞＝reliability
in the formula, BLER is an obtained BLER value, N _ trans is the number of transmissions, and reliability is a service reliability indicator.
5. The method according to claim 1, wherein the influence factors of the transmission delay include the following air interface parameters: TDD frame structure/carrier mode, timing parameters K, FDD/TDD transmit mode, and scheduling mode.
6. The method according to claim 5, wherein the method for calculating the transmission delay comprises:
inputting a frame structure array A [ i ] and a time sequence parameter K according to the transmission times;
sequentially judging whether the mode is an FDD mode or a TDD mode, an uplink mode or a downlink mode, and a scheduling mode;
and calculating time delay according to the mode judgment result.
7. The measuring and calculating method according to claim 6, wherein the time delay calculating method corresponding to each judgment result is:
for a TDD uplink SR scheduling mode, the time delay calculation comprises the calculation of SR _ slot number, K2_ slot number and RE _ TX _ slot number, and the time delay is SR _ slot + K2_ slot + RE _ TX _ slot;
for the TDD uplink scheduling-free mode, the SR _ slot number is 0, the rest is the same as the TDD uplink SR scheduling mode, and the time delay is K2_ slot + RE _ TX _ slot;
for the TDD downlink mode, the time delay calculation comprises calculation of K0_ slot number, K1_ slot number and K3_ slot number, and the time delay is K0_ slot + K1_ slot + K3_ slot;
for the FDD downlink mode, N is the number of retransmissions, and N is N _ trans-1, where the time delay is K0+ K1+ K3 × N + 1;
for the FDD uplink SR scheduling mode, the delay is SR + K2+ RE _ TX × N +1, and N is N _ trans-1;
for FDD uplink scheduling-free mode, the delay is K2+ RE _ TX N +1, and N is N _ trans-1.
8. A system for measuring and calculating 5G terminal service performance requirement and PRB resource requirement is characterized by comprising: the device comprises a first calculation module, a second calculation module, a BLER value acquisition module, a transmission frequency determination module and a time delay calculation module;
the first calculating module is used for calculating MCS;
the second calculation module is used for simulating and acquiring a waterfall curve;
the BLER value acquisition module determines an MCS curve which meets the requirement of service bandwidth according to the MCS Index and the waterfall curve, and the BLER value of the curve can be uniquely determined by fixing the SINR value of the MCS curve;
the transmission frequency determining module is used for acquiring the transmission frequency according to the BLER value;
and the time delay calculating module calculates the transmission time delay according to the transmission times and the influence factors of the transmission time delay.
9. A computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by a computing device, cause the computing device to perform any of the methods of claims 1-7.
10. A computing device, comprising: one or more processors, memory, and one or more programs stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions for performing any of the methods of claims 1-7.
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| CN103152754A (en) * | 2013-03-12 | 2013-06-12 | 京信通信系统（中国）有限公司 | Link adaptation method and device in long term evolution (LTE) system |
| CN104468048A (en) * | 2014-12-15 | 2015-03-25 | 武汉理工大学 | Method for determining HAR Q-I type available AMC scheme according to retransmission and combination method |
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